Regardless of what form symptoms take (SKIN RASH, tingling around the MOUTH, DIARRHEA), a type I hypersensitivity reaction is a systemic response-it affects and involves the body as a whole.
How to Read Your Eyeglass Prescription. The first step to understanding your eyeglass prescription is knowing what OD and OS mean. They are abbreviations for oculus dexter and oculus sinister, which are Latin terms for right eye and left eye.
YOUR EYEGLASS PRESCRIPTION DECODED. Your eyeglass prescription is typically written in a grid like the one below, using a combination of terms, abbreviations, and numbers. Usually youâll see these abbreviations along the left side: O.D. stands for oculus dexter, meaning right eye. O.S. stands for oculus sinister, meaning left eye. O.U. stands for and oculus uterque, meaning both eyes.